4 Principles of Flight Flashcards
What is viscosity?
How THICK the air is
What is friction?
Resistance acting upon an object
What is pressure?
Force applied in a perpendicular direction to the surface of an object
What is atmospheric pressure?
14.7 lbs per square in and standard temperature
What is pressure altitude
What the altitude is when the altimeter is set to 29.92.
What is density altitude?
Pressure altitude corrected for non standard temperature
How does density affect performance?
As density increases(lower density altitude, meaning the plane feels like it’s lower) better performance. It is the opposite when the density decreases. Plane feels like it is higher, meaning there is less air, worse performance.
How does temperature affect performance?
As temperature rises, it lowers the density of the air, meaning there is less air which means worse performance.
How does humidity affect performance?
As humidity rises, more water molecules occupy the air meaning there is less and less air, lowering the density, increasing the density altitude(meaning the plane feels higher), worse performance.
What is Newton’s 3rd law and how does it create lift?
Every action has an equal and opposite reaction. As the wind pushes down, the reaction is pushing it back up creating lift.
What is Bernoulli’s law and how does it create lift?
As velocity increases, pressure decreases. As you go faster, the air over the wing is increasing in speed and so then underneath the wing the pressure is low. Low pressure tries to rise, thus pushing the air up.
